Okay, so you know how buses are big vehicles that drive on the road and take people from one place to another? Well, sometimes people need to transport things like big containers or trailers that are too heavy for normal buses to carry. That's where the road-railer bus comes in!
A road-railer bus is like a special type of bus that has both wheels like a normal bus and railways like a train. It's called a "road-railer" because it can run on both roads and rails, which is pretty cool! These buses have special trailers that can be lifted onto the rails, and the bus can drive them wherever they need to go.
Now, you might be wondering, "Why would anyone need to use a road-railer bus?" Well, it's because sometimes the places where people need to transport things aren't just next to a road! For example, maybe they need to bring a big container from a factory that's far away from any roads, but there's a railway nearby. That's where the road-railer bus can come in handy.
In summary, a road-railer bus is a special type of bus that has both wheels and railways so it can transport heavy things to places that might not be easily accessible by normal buses.